JP2007027605A - Method for manufacturing stacked electronic component, and device thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a stacked electronic component capable of shortening time for a stacking process and using a thinned internal structure as a continuously stacking method, and to provide its device. <P>SOLUTION: The manufacturing device of the stacked electronic component is provided with a sheet feeder for supplying green sheets 8, an adhesive applier 3 for applying an adhesive to the green sheets 8, a rotary drum 4 for mounting and stacking the green sheets 8, an adhesive transfer for transferring the adhesive onto the green sheet 8 on the surface of the rotary drum 4, an unwinding roll 16 for feeding the internal structure 15 formed on a conveyance film 19, a detecting and recognizing mechanism 14 for detecting and recognizing the transferred internal structure 15, and a drying mechanism 13 for drying the transferred internal structure 15. The adhesive is transferred with the green sheet 8 on the surface of the rotary drum 4 patterned, and the internal structure 15 on the surface of the conveyance film 19 is similarly separated (exfoliated) and transferred for continuously stacking. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a multilayer electronic component and a device therefor which constitute a multilayer body in which internal components are stacked to form various electronic components.

  Conventionally, as a method of manufacturing a multilayer electronic component, a predetermined green sheet is prepared, and a sheet laminate is manufactured by stacking a necessary number of these green sheets. On the surface of the green sheet to be laminated, an internal structure made of an appropriate material is formed according to the required function of the multilayer electronic component, and the internal structure is directly green with a predetermined pattern. It is formed by screen printing on a sheet or vacuum deposition.

  The sheet laminate is cut and divided into predetermined shapes to obtain individual chip-type multilayer electronic components, which are fired at a predetermined temperature, and external electrodes are formed on the surface or end of the chip as necessary. The

  In such a multilayer electronic component, as a method of forming the internal structure on the surface of the green sheet, a method of forming a predetermined pattern directly on the surface of the green sheet by screen printing or intaglio offset printing, or a vacuum deposition method The internal structure is formed on the surface of the transport film by the method of transferring the internal structure in a pattern on the surface of the green sheet, and further, a release layer on the pattern is formed on the surface of the transport film, A method of forming an electrode from the top is known.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2003-86454 A

  However, in the method of printing directly on the surface of the conventional green sheet by screen printing or intaglio offset printing, the thickness of the internal structure is large, and when the number of layers increases, sufficient pressure is applied to the portion where the internal structure is not formed. Is not applied, the adhesion between the sheets is weakened, causing a structural defect of the chip-shaped multilayer electronic component.

  Also, in the method of transferring the internal structure to the green sheet, the internal structure is thin and the release layer is patterned, so that the transferability is improved, but the release layer is patterned. For this reason, it is necessary to cut and stack sheets one by one for each pattern, which increases the time for the stacking process in manufacturing a product, that is, a multilayer electronic component, resulting in high cost and long delivery time. It had the problem that.

  The present invention is intended to solve the above-mentioned conventional problems, and is a multilayer electronic component that has sufficient adhesion between sheets, is low in cost and has a short delivery time, and needs to be thinned and highly laminated in the future. An object of the present invention is to provide a manufacturing method and an apparatus for a multilayer electronic component which is a continuous lamination method using a thinned internal structure rather than a batch process of laminating one sheet at a time. To do.

  In order to achieve the above object, the present invention has the following configuration.

  The invention according to the first aspect of the present invention is such that the green sheet is unwound continuously, an adhesive is applied to the unwound green sheet, and the green sheet coated with the adhesive is used as a drum-shaped rotating body. Winding around the outer circumference, patterning and transferring the adhesive on one side of the wound green sheet, the internal structure formed on one side of the transport film continuously supplied in a pattern Separately, transferred to a green sheet and bonded with the adhesive, and the green sheet having an internal structure formed thereon is continuously laminated. Similarly, the internal structure can be continuously transferred to the green sheet, and the thin internal structure can be continuously laminated.

  The invention according to claim 2 of the present invention particularly includes a sheet supply unit having a winding diameter detection sensor for supplying a green sheet, an adhesive application unit for applying an adhesive to the green sheet, and the adhesive. A rotating drum, which is a drum-like rotating body for winding and placing the coated green sheet on the surface of a pallet arranged on the outer circumference, and presses the green sheet against a predetermined position of the pallet in the rotating drum. An intaglio offset printing section that has a pressing roller, an intaglio, and an offset roll to rotate and can be rotated independently of the rotating drum by a synchronous mechanism or a differential mechanism, and an adhesive is applied to the surface of the green sheet. A pressing roller for separating the internal structure formed on one side of the transport film and transferring it to the green sheet; The adhesive is printed or transferred to the adhesive sheet or the drying mechanism that dries the internal components. The structure can be transferred continuously to the green sheet, and the thin internal structure can be continuously laminated.

  The invention according to claim 3 of the present invention has a sheet roll in which the unwinding speed is controlled by the detection output of the winding diameter detection sensor, in particular, in order to produce a laminated body continuously. It has a configuration that serves as a sheet supply unit of a mechanism for continuously unwinding the sheet, thereby enabling optimum control of the supply of the green sheet, so that the green sheet is continuously and uniformly distributed on the outer circumferential surface of the rotating drum. It has the effect of being able to supply.

  The invention according to claim 4 of the present invention has a drum-like rotating body and a plate having a pattern synchronized with the rotating body in order to continuously laminate, and in the rotating body by the rotation of the rotating body. It has a configuration in which a mechanism for forming the pattern is formed at the same position, thereby having an effect of being able to apply and form a predetermined pattern of adhesive in a predetermined predetermined place continuously and reliably.

  The invention according to claim 5 of the present invention has a configuration in which a mechanism for applying a patterned adhesive for transferring the internal structure is provided on one side of the green sheet. Thus, there is an effect that a patterned adhesive can be applied and formed in a predetermined predetermined place continuously and reliably.

  The invention according to claim 6 of the present invention has a configuration in which a detection recognition mechanism using an optical system and a correction unit using an alignment mechanism are provided, in particular, in order to correct the displacement of the internal components in the stack. As a result, the formation and status of the internal structure can be confirmed, the difference from the position of the internal structure in the previous stack, that is, the position of the internal structure in the previous stack can be calculated, and the position of the internal structure in the next stack can be adjusted or corrected. Have

  The method and apparatus for manufacturing a multilayer electronic component according to the present invention includes a green sheet continuously unwound, an adhesive applied to the unwound green sheet, and the green sheet coated with the adhesive applied to a drum-shaped rotating body. Winding, patterning and transferring the adhesive on one side of the wound green sheet, separating the internal components formed on one side of the continuously supplied transport film in a pattern The green sheet is transferred to a green sheet and bonded with the adhesive to form an internal structure. The green sheet is continuously laminated. A thin internal sheet can be used, and the internal structure is patterned. By not doing so, it is possible to continuously supply the forming member, to enable continuous lamination of the thin sheet, and to shorten the time of the lamination process.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIGS. 1A and 1B are a front view and a side view, respectively, of a schematic configuration of a main part of a multilayer electronic component manufacturing apparatus according to an embodiment of the present invention.

  In FIG. 1, a manufacturing apparatus 1 for manufacturing various laminated electronic components has a sheet supply unit composed of a sheet roll 2 around which a green sheet 8 is wound. A sensor for measuring the diameter (outer circumferential diameter), that is, a winding diameter detection is attached, and the unwinding speed of the green sheet 8 can be controlled or changed by the measurement output of the sensor, and the sheet supply unit unwinds. The speed is appropriately changed, and the green sheet 8 is supplied to the adhesive application unit 3 at an optimum speed.

  The adhesive application unit 3 is a unit that applies an adhesive to one or both sides of the green sheet 8 supplied from the sheet supply unit. The adhesive is applied to a predetermined place by a method such as a spray method or a roller coating method. The green sheet 8 coated continuously and coated with an adhesive on the outer circumferential surface of the rotating drum 4 is supplied along the pressing roll 6.

  The pressing roll 6 is configured and arranged so that the adhesion between the layers of the green sheet 8 laminated on the green sheet 8 on the outer circumferential surface of the rotating drum 4 is improved.

  On the outer circumferential surface of the rotating drum 4, a plurality of pallets 11 are arranged at equal intervals in an arc shape obtained by equally dividing the circumference, and each pallet 11 is attached to and detached from the outer circumferential surface of the rotating drum 4. It is free.

  Further, a plurality of grooves 10 into which cutting blades are inserted are provided between the pallets 11, and the sheet laminate 12 on the upper surface of the pallet 11 can be separated and taken out for each unit of the pallet 11.

  The intaglio 5a and the offset roll 5b of the intaglio offset printing section are rotationally driven in the directions indicated by arrows (c) and (d), so that the adhesive on the outer circumferential surface of the intaglio 5a is transferred to the outer circumference of the offset roll 5b. Transfer to the surface. The transferred adhesive is further transferred to a predetermined portion of the sheet laminate 12 on the outer circumferential surface of the rotating drum 4.

  By disposing the tip of the squeegee 5c made of a hard elastic body on the outer circumferential surface of the intaglio 5a at a predetermined interval, it is possible to scrape off excess adhesive on the outer circumferential surface of the intaglio 5a. .

  Since the intaglio 5a, the offset roll 5b, and the rotary drum 4 in the intaglio offset printing section are rotationally driven by the same main drive shaft, they can be rotated synchronously, and the intaglio offset printing section includes the intaglio 5a and the offset roll. 5b has a drive shaft that drives only 5b, and the rotational direction of the rotary drum 4 and the intaglio offset printing section can be shifted by rotating the drive shaft using this drive shaft. The mechanism 20 is disposed in the configuration and position shown in FIG.

  The ratio of the rotational speed of the intaglio 5a of the intaglio offset printing section by the main drive shaft and the rotational speed of the rotary drum 4 is set to a constant ratio optimum for transfer or printing, such as 8: 1.

  The printing up / down mechanism allows the intaglio offset printing section to move up and down relative to the housing 9 and is regulated and guided by a printing up / down guide 7b attached to the housing 9 to attach the printing unit. It can be driven integrally with the plate 7c by a printing vertical motor 7a.

  Each time the green sheets 8 are stacked, the sheet stack 12 increases in height, that is, the stack thickness, and as a result, increases the diameter (outer circumferential diameter) of the rotating drum 4. By raising the printing portion, the adhesive application position, that is, the position of the internal structure 15 can be adjusted to the optimum position.

  The internal structure 15 itself is formed on one side (or both sides) of the transport film 19 and is set on the unwinding roll 16, and the unwinding roll 16 sets the unwinding speed to the diameter (outer circumference) of the rotating drum 4. The conveying film 19 is sent out in the direction of the arrow (v).

  The pressing roll 18 is a heat-resistant elastic body such as silicon rubber, and is heated by a heater or far infrared rays. The pressing roll 18 presses the transport film 19 against a predetermined surface of the sheet laminate 12 by driving an air cylinder or the like. It is possible to follow the increase in the diameter (outer circumferential diameter) of the rotating drum 4.

  The winding roll 17 winds the transport film 19 in which the internal structure 15 is transferred to the green sheet 8 and the internal structure 15 is lost. The position of the winding roll 17 is the diameter of the rotating drum 4 (outer circle). It is possible to follow the increase in the (circumferential diameter) and move to a position where there is no hindrance.

  A detection recognition mechanism 14 using a sensor for recognizing the shape and configuration is installed toward the central direction of the rotary drum 4. The detection recognition mechanism 14 is adjusted according to a change in the thickness of the laminate in the rotary drum 4 by NC driving. A recognition correction that can be moved, always detecting and recognizing the internal structure 15 on the outer circumferential surface of the rotating drum 4, and performing corrections such as adjustment and correction by a correction unit including a differential mechanism that is an alignment mechanism It has a process.

  As an example of the detection / recognition mechanism 14, an optical image input mechanism such as a CCD camera and a general-purpose recognition device (unit) can be combined.

  In the vicinity of the outer circumference of the rotating drum 4, a drying mechanism 13 for a drying process for drying the transferred or printed internal structure 15 is disposed. The drying mechanism 13 in this drying process can change settings such as air volume and temperature during operation, and can form a laminate that is optimal for each material and function used.

  Next, a method for laminating the green sheets of the present invention using the manufacturing apparatus 1 having the above configuration will be described with reference to the drawings.

  On the both sides of the green sheet 8, any internal components 15, that is, elements (element materials) such as electrodes and dielectrics are not printed in the case of a multilayer capacitor. An adhesive sheet is attached in advance so that the first green sheet 8 is in close contact with the pallet 11 on the outer circumferential surface of the rotating drum 4.

  The tip of the green sheet 8 delivered from the sheet supply unit passes through the adhesive application unit 3 and is fixed (adhered) to the outer circumferential surface of the rotating drum 4 along the pressing roller 6.

  At the start of lamination, the diameter (outer circumferential diameter) of the sheet roll 2 is measured with a sensor, and the unwinding speed is switched and set in the direction indicated by the arrow (A) from the sheet roll 2 of the sheet supply unit. Then, the adhesive is applied to one side of the green sheet 8 by the adhesive application unit 3 and supplied along the outer circumferential surface of the rotating drum 4 by the pressing roller 6. Thus, the first layer of the sheet laminate 12 of the green sheets 8 is formed on the outer circumferential surface of the rotating drum 4, that is, on each pallet 11.

  The rotating drum 4 rotates in the direction indicated by the arrow (A) and winds the green sheet 8. As the number of layers of the green sheet 8 on the outer circumferential surface of the rotating drum 4 increases, The diameter of the peripheral surface, that is, the outer circumferential diameter of the rotary drum 4 is increased, but the intaglio offset printing unit is used to keep the printing pressure amount of the rotary drum 4 and the offset roll 5b constant by using the printing vertical motor 7a of the printing vertical mechanism Is raised or lowered, and the adhesive is transferred to a predetermined portion of the green sheet 8 under the optimum conditions.

  Next, the operation (operation) of the adhesive in the intaglio offset printing unit will be described with reference to FIG. 2A is a schematic front view of the main parts of the intaglio and offset roll of the manufacturing apparatus, FIG. 2B is a plan view before application of the adhesive at the portion indicated by arrow A, and FIG. 2C is the manufacturing apparatus. FIG. 2D is a plan view after application of the adhesive in the portion indicated by the arrow B. FIG.

  In FIG. 2 (a), the squeegee 5c approaches at a predetermined interval during the rotation of the intaglio 5a, and scrapes off the excess adhesive 21 protruding from the supplied adhesive 21 pattern. The adhesive 21 has not been applied yet.

  Next, as shown in FIG. 2 (c), the intaglio 5a and the offset roll 5b rotate in synchronism, so that the adhesive as indicated by the arrow A is not applied as indicated by the arrow B. 21 is transferred in a predetermined pattern. Further, when the offset roll 5 b and the rotating drum 4 are rotated, the adhesive 21 transferred to the offset roll 5 b is transferred onto the surface of the green sheet 8 on the outer circumferential surface of the rotating drum 4.

  Next, the supply of the internal structure 15 made of elements (element materials) such as electrodes and dielectrics in a multilayer capacitor will be described with reference to FIG. As shown in FIG. 3A, the internal structure 15 is in a thin film state on one side of the transport film 19, with a release layer 22 for ensuring separation and separation of the transport film 19 and the internal structure 15. Is formed.

  The internal structure 15 is formed on one side of the transport film 19, wound into a roll, and set on the unwinding roll 16.

  Before starting the operation of the manufacturing apparatus 1, the transport film 19 is pulled out from the unwinding roll 16 in the direction of the arrow (v) as shown in FIG. The leading end of the transport film 19 is fixed or fixed by sticking or the like.

  The set transport film 19 is pressed against the green sheet 8 by the pressing roll 18, and at this time, the green sheet 8 is already coated with a predetermined pattern-shaped adhesive 21 at the intaglio offset printing section. .

  The internal structure 15 on one side of the transport film 19 pressed by the pressing roll 18 is separated (peeled) from the transport film 19 in a predetermined pattern because of the adhesive 21 applied on one side of the green sheet 8. And transferred.

  The transferred internal structure 15 is detected and recognized by the detection recognition mechanism 14. The position of the internal structure 15 at the previous (previous) stacking is compared with the position of the current internal structure 15, and the difference (difference) in the position is fed back to the differential mechanism. The intaglio 5a and the offset roll 5b can be corrected by rotation driving by a drive different from the rotary drum 4 by a differential mechanism, that is, an alignment mechanism that constitutes a correction unit. (Difference) is rotationally corrected, and the position for applying the next adhesive 21 is set by adjusting or correcting.

  The adhesive 21 applied to the transferred internal component 15 and the adhesive applied by the adhesive application unit are dried under a predetermined condition in the drying mechanism 13, and the following is performed on one side of the dried sheet laminate 12. Green sheets 8 are laminated. The above-described lamination process is continuously performed to produce a necessary laminate.

  The method and apparatus for manufacturing a multilayer electronic component according to the present invention can use a thin-layer internal structure, and has the effect of shortening the manufacturing process time compared to the prior art. This is useful as a device for manufacturing small electronic components.

(A) Front view of main part outline configuration of apparatus for manufacturing multilayer electronic component according to embodiment of the present invention, (b) Side view of main part outline configuration (A) The main part outline | summary front view of the intaglio and offset roll of a manufacturing apparatus, (b) The top view before the adhesive agent application | coating in the part of the arrow A, (c) The intaglio and offset roll of the same manufacturing apparatus have rotated Part outline front view, (d) Plan view after application of adhesive in part B (A) principal part outline sectional view of the conveyance film, (b) principal part outline perspective view explaining separation (peeling) of the internal structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Sheet roll 3 Adhesive application part 4 Rotating drum 5a Intaglio 5b Offset roll 5c Squeegee 6 Press roll 7a Printing vertical motor 7b Printing vertical guide 7c Printing unit mounting plate 8 Green sheet 9 Case 10 Groove 11 Palette 12 Sheet lamination Body 13 Drying mechanism 14 Detection / recognition mechanism 15 Internal component 16 Unwinding roll 17 Winding roll 18 Pressing roll 19 Conveying film 20 Differential mechanism 21 Adhesive 22 Release layer (A) Sheet supply direction of green sheet (A) Rotating drum (C) Intaglio plate rotation direction (d) Offset roll rotation direction (e) Conveyance film unwinding direction

Claims (6)

The green sheet is continuously unwound, an adhesive is applied to the unwound green sheet, and the green sheet coated with the adhesive is wound around the outer circumference of the drum-shaped rotating body. The adhesive is patterned on one side of the sheet and transferred, and the internal structure formed on one side of the continuously supplied transport film is separated in a pattern and transferred to the green sheet. A method of manufacturing a multilayer electronic component, wherein the green sheets that are bonded to form an internal structure are continuously stacked. A sheet supply unit having a winding diameter detection sensor for delivering a green sheet, an adhesive application unit for applying an adhesive to the green sheet, and a green sheet coated with the adhesive are arranged on the outer circumference. A rotating drum that is a drum-like rotating body wound and placed on the surface of the pallet, a pressing roller that presses the green sheet against a predetermined portion of the pallet in the rotating drum, an intaglio, and an offset roll. And an intaglio offset printing section for applying an adhesive to the surface of the green sheet, which can be independently rotated by a synchronous rotation or differential mechanism with the rotating drum, and formed on one side of a transport film continuously supplied from an unwinding roll. A pressing roller for separating the internal structure and transferring it to the green sheet; and printing or printing on the green sheet Multilayer electronic component manufacturing apparatus provided with a drying mechanism for drying the photographed adhesive or internal structure. In order to continuously manufacture a laminated body, it has a sheet roll whose unwinding speed is controlled by the detection output of the winding diameter detection sensor, and has a sheet supply portion of a mechanism for continuously unwinding a roll-shaped green sheet. The apparatus for manufacturing a multilayer electronic component according to claim 2. The invention has a drum-shaped rotating body and a pattern plate synchronized with the rotating body for continuous lamination, and a mechanism for forming the pattern at the same position on the rotating body by the rotation of the rotating body. 2. The apparatus for manufacturing a laminated electronic component according to 2 or 3. The multilayer electronic component manufacturing apparatus according to any one of claims 2 to 4, further comprising a mechanism for applying a patterned adhesive for transferring the internal structure on one side of the green sheet. The apparatus for manufacturing a multilayer electronic component according to any one of claims 2 to 5, further comprising a detection recognition mechanism using an optical system and a correction unit using an alignment mechanism in order to correct a displacement of an internal component during stacking.

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